text: * Amit Chatterjee, Sponge Iron Production By Direct Reduction Of Iron Oxide, PHI Learning Private Limited, 2010, 353 p. (, [https://books.google.fr/books?id=IcT6-tg1uz4C&printsec=frontcover read online] [https://archive.wikiwix.com/cache/?url=https%3A%2F%2Fbooks.google.fr%2Fbooks%3Fid%3DIcT6-tg1uz4C%26printsec%3Dfrontcover archive])
  * "[http://www.ecacwb.org/editor_upload/files/Process%20Technology.pdf Process technology followed for sponge iron]" [https://archive.wikiwix.com/cache/?url=http%3A%2F%2Fwww.ecacwb.org%2Feditor_upload%2Ffiles%2FProcess%2520Technology.pdf archive], Environment Compliance Assistance Centre (ECAC)
  * "[http://www.recyclingtoday.com/news/images/dri.pdf World direct reduction statistics]" [https://web.archive.org/web/20050829184014/http://www.recyclingtoday.com/news/images/dri.pdf archive of August 29th, 2005], Midrex, 2001.
  * "[http://www.midrex.com/uploads/documents/MDX%20STATS%202012%207-3-13Final.pdf World direct reduction statistics] " [https://archive.wikiwix.com/cache/?url=http%3A%2F%2Fwww.midrex.com%2Fuploads%2Fdocuments%2FMDX%2520STATS%25202012%25207-3-13Final.pdf archive], Midrex, 2012.
  * J. Feinman, "[http://jpkc.gsut.edu.cn/upload/20120523/20120523181034985.pdf Direct Reduction and Smelting Processes] " [https://archive.wikiwix.com/cache/?url=http%3A%2F%2Fjpkc.gsut.edu.cn%2Fupload%2F20120523%2F20120523181034985.pdf archive], The AISE Steel Foundation, 1999.
  * "[http://ietd.iipnetwork.org/content/direct-reduced-iron Direct Reduced Iron] " [https://archive.wikiwix.com/cache/?url=http%3A%2F%2Fietd.iipnetwork.org%2Fcontent%2Fdirect-reduced-iron archive], The Institute for Industrial Productivity.